It's less than a month before Primary Day in New York and GOP conven tion-endorsed gubernatorial candidate Rick Lazio is rapidly losing ground to challenger Carl Paladino of Buffalo. According to the latest Siena College poll, Lazio's 20-point lead over the gadfly businessman, registered a month ago, has shrunk to 13 points, 43-30. And in recent days Paladino has been endorsed by several upstate GOP county chairmen and such elected officials as Assemblywoman Jane Corwin of Nia- gara. Yes, there's a regional element to some of this -- Paladino is something of a hero in the Buffalo area -- but...